package com.zzyl.nursing.service.impl;

import cn.hutool.http.HttpUtil;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.zzyl.common.exception.base.BaseException;
import com.zzyl.nursing.service.WechatService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

import java.util.HashMap;
import java.util.Map;

@Service
public class WechatServiceImpl implements WechatService {

    // 登录
    private static final String REQUEST_URL = "https://api.weixin.qq.com/sns/jscode2session?grant_type=authorization_code";

    // 获取token
    private static final String TOKEN_URL = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential";

    // 获取手机号
    private static final String PHONE_REQUEST_URL = "https://api.weixin.qq.com/wxa/business/getuserphonenumber?access_token=";


    @Value("${wechat.appId}")
    private String appId;
    @Value("${wechat.appSecret}")
    private String appSecret;

    @Override
    public String getOpenid(String code) {
        Map<String, Object> params =  new HashMap<>();
        params.put("appid", appId);
        params.put("secret", appSecret);
        params.put("js_code", code);
        String result = HttpUtil.get(REQUEST_URL, params);
        JSONObject jsonObject  = JSONUtil.parseObj(result);
        if (jsonObject.getInt("errcode") != null){
            throw new BaseException(jsonObject.getStr("errmsg"));
        }
        return jsonObject.getStr("openid");
    }

    @Override
    public String getPhone(String phoneCode) {
        String token = getAccessToken();
        Map<String, Object> params =  new HashMap<>();
        params.put("code", phoneCode);
        String result = HttpUtil.post(PHONE_REQUEST_URL + token, JSONUtil.toJsonStr(params));
        JSONObject resultJSON = JSONUtil.parseObj(result);
        if (resultJSON.getInt("errcode") != 0){
            throw new BaseException(resultJSON.getStr("errmsg"));
        }
        return resultJSON.getJSONObject("phone_info").getStr("phoneNumber");
    }

    private String getAccessToken() {
        Map<String, Object> params =  new HashMap<>();
        params.put("appid", appId);
        params.put("secret", appSecret);
        String result = HttpUtil.get(TOKEN_URL, params);
        JSONObject jsonObject  = JSONUtil.parseObj(result);
        if (jsonObject.getInt("errcode") != null){
            throw new BaseException(jsonObject.getStr("errmsg"));
        }
        return jsonObject.getStr("access_token");
    }
}
